Fibre-optic gyroscope
Gyroscope that uses fiber optics
Fibre-optic gyroscope
A fibre-optic gyroscope (FOG) senses changes in orientation using the Sagnac effect, thus performing the function of a mechanical gyroscope. However its principle of operation is instead based on the interference of light which has passed through a coil of optical fibre, which can be as long as 5 kilometres (3 mi).
Read on Wikipedia · Image D. mcfadden, CC BY-SA 3.0
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